Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package org.apache.asterix.event.management; import java.io.BufferedInputStream; import java.io.File; import java.io.IOException; import java.io.StringWriter; import java.util.ArrayList; import java.util.List; import org.apache.asterix.event.driver.EventDriver; import org.apache.asterix.event.schema.cluster.Cluster; import org.apache.asterix.event.schema.cluster.Node; import org.apache.asterix.event.schema.cluster.Property; import org.apache.asterix.event.schema.pattern.Pattern; import org.apache.asterix.event.service.AsterixEventServiceUtil; import org.apache.commons.io.IOUtils; public class EventExecutor { private static final String EXECUTE_SCRIPT = "execute.sh"; private static final String IP_LOCATION = "IP_LOCATION"; private static final String CLUSTER_ENV = "ENV"; private static final String SCRIPT = "SCRIPT"; private static final String ARGS = "ARGS"; private static final String DAEMON = "DAEMON"; public void executeEvent(Node node, String script, List<String> args, boolean isDaemon, Cluster cluster, Pattern pattern, IOutputHandler outputHandler, AsterixEventServiceClient client) throws IOException { List<String> pargs = new ArrayList<>(); pargs.add("/bin/bash"); pargs.add(client.getEventsHomeDir() + File.separator + AsterixEventServiceUtil.EVENT_DIR + File.separator + EXECUTE_SCRIPT); StringBuilder envBuffer = new StringBuilder(IP_LOCATION + "=" + node.getClusterIp() + " "); boolean isMasterNode = node.getId().equals(cluster.getMasterNode().getId()); if (!node.getId().equals(EventDriver.CLIENT_NODE_ID) && cluster.getEnv() != null) { for (Property p : cluster.getEnv().getProperty()) { if (p.getKey().equals("JAVA_HOME")) { String val = node.getJavaHome() == null ? p.getValue() : node.getJavaHome(); envBuffer.append(p.getKey() + "=" + val + " "); } else if (p.getKey().equals(EventUtil.NC_JAVA_OPTS)) { if (!isMasterNode) { appendJavaOpts(node, envBuffer, p); } } else if (p.getKey().equals(EventUtil.CC_JAVA_OPTS)) { if (isMasterNode) { appendJavaOpts(node, envBuffer, p); } } else if (p.getKey().equals("LOG_DIR")) { String val = node.getLogDir() == null ? p.getValue() : node.getLogDir(); envBuffer.append(p.getKey() + "=" + val + " "); } else { envBuffer.append(p.getKey() + "=" + p.getValue() + " "); } } pargs.add(cluster.getUsername() == null ? System.getProperty("user.name") : cluster.getUsername()); } StringBuilder argBuffer = new StringBuilder(); if (args != null && args.size() > 0) { for (String arg : args) { argBuffer.append(arg + " "); } } ProcessBuilder pb = new ProcessBuilder(pargs); pb.environment().put(IP_LOCATION, node.getClusterIp()); pb.environment().put(CLUSTER_ENV, envBuffer.toString()); pb.environment().put(SCRIPT, script); pb.environment().put(ARGS, argBuffer.toString()); pb.environment().put(DAEMON, Boolean.toString(isDaemon)); Process p = pb.start(); if (!isDaemon) { BufferedInputStream bis = new BufferedInputStream(p.getInputStream()); StringWriter writer = new StringWriter(); IOUtils.copy(bis, writer, "UTF-8"); String result = writer.getBuffer().toString(); OutputAnalysis analysis = outputHandler.reportEventOutput(pattern.getEvent(), result); if (!analysis.isExpected()) { throw new IOException(analysis.getErrorMessage() + result); } } } protected void appendJavaOpts(Node node, StringBuilder envBuffer, Property p) { StringBuilder builder = new StringBuilder(); builder.append("\""); String javaOpts = p.getValue(); if (javaOpts != null) { builder.append(javaOpts); } if (node.getDebugPort() != null) { int debugPort = node.getDebugPort().intValue(); if (javaOpts == null || !javaOpts.contains("-Xdebug")) { builder.append(" -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=") .append(debugPort); } } builder.append("\""); envBuffer.append("JAVA_OPTS=").append(builder.toString()).append(" "); } }